Dioecious trees. Leaves alternate, simple, stipulate. Buds with several clearly visible unequal outer scales. Flowers appearing before the leaves, in pendulous catkins, catkin scales toothed or laciniate; each flower with a cup-like disk; stamens 4-many.
Derivation of name: the classical name for poplars
Worldwide: 35 species in northern temperate regions
African Plants: A Photo Guide (Senckenberg): Populus BHL (Biodiversity Heritage Library): Populus EOL (Encyclopedia of Life): Populus GBIF (Global Biodiversity Information Facility): Populus Google: Web - Images - Scholar iNaturalist: Populus IPNI (International Plant Names Index): Populus JSTOR Plant Science: Populus Mansfeld World Database of Agricultural and Horticultural Crops: Populus Plants of the World Online: Populus Tropicos: Populus Wikipedia: Populus